Rodgers Topper Owner's Manual page 5

The layout of your "TOPPER" conforms to the standard
two manual home organ concept.
The top manual (keyboard) is called the Solo Manual.
The Solo Manual contains stops having solo qualities
(color and brilliance) as well as ensemble voices (voices
that blend together).
The bottom manual (keyboard) is called the Accompani-
ment Manual. The Accompaniment Manual provides voices that
give suitable accompaniment to the solo and ensemble voices
of the Solo Manual.
The keyboards have 61 keys with a complete range from
bottom 16' to the top of the 2'. There is no doubling back
on any stop.
The Pedal Clavier (so named because it is the keyboard
for the feet) has 25. pedals and provides the bass tones for
the undergirth of the total organ.
The switches that turn the voices of an organ on and
off are called Stops. The "TOPPER" is unique in that it
requires no physical movement to turn stops on and off,
but rather uses a light touch on the conveniently located
touch switches.
-2-